Extragalactic Candidates — Systematic Astrometric Drift Dataset (Gaia DR3)

57 Extragalactic Candidates — Systematic Astrometric Drift Dataset (Gaia DR3)Author: Corales Requena, Jean CarlosDate: February 2026Related work: Unaccounted Temporal Balance in Gravitational Reference Systems: An Open Question — https://doi.org/10.5281/zenodo.18715696DescriptionThis dataset contains 57 extragalactic candidate objects selected from Gaia DR3 showing a systematic astrometric displacement clustering near 211 AU over Gaia's 5-year baseline.All 57 objects meet the following criteria:Zero parallax (|ϖ| < 0.2 mas) — confirming extragalactic distancesQuasar-typical colors (−0.3 < BP−RP < 0.5)Mean proper motion: 0.422 mas/yrMean systematic drift: 211 ± 1 AU over 5 years74% externally validated through Pan-STARRS, AllWISE, and/or SDSSFiles57_CUASARES_DATOS_CRUDOS.csv — Raw dataset with Gaia source_id, coordinates (RA, Dec), proper motions, displacement in AU, photometry, and cross-match resultsfigura_57_cuasares.png — Validation figure showing drift distribution, sky distribution, color-magnitude diagram, and summary statistics. Open QuestionThe signal at 211 AU/5yr corresponds to an apparent velocity of ~200 km/s at ~100 Mpc.Is this signal real?This dataset is released for independent verification. The theoretical interpretation connecting this signal to the unaccounted temporal balance described in the related work (DOI: 10.5281/zenodo.18715696) is reserved for future publication.This research was conducted independently with no institutional funding or computing resources beyond a mobile phone. If you find this dataset valuable and wish to support continued investigation: [e-mail] endorsement welcome from researchers in astrometry, proper motions, or large-scale structure.